The Boys' Stars Color Change Rash guard is a stylish and functional swimwear option for boys. Made from a blend of nylon and spandex, this rash guard offers a comfortable and flexible fit. The unique feature of this rash guard is its color-changing ability when activated by water. The pattern magically reveals itself, adding a fun element to swimming activities. With a UPF50+ rating, it provides excellent sun protection for your child's delicate skin. Easy to care for, simply turn it inside out and machine wash cold with like colors. Avoid using bleach and line dry for best results. The rash guard is made of 85% polyester and 15% spandex, ensuring durability and stretchability.